发送邮件程序，大家来帮忙。
private   int   SendMail(string   Tomail)
        {
                MailMessage   myMail   =   new   MailMessage();

                myMail.From   =   "fmtvlive@126.com ";

                myMail.To   =   Tomail;

                myMail.Subject   =   "1111111 ";

                myMail.Priority   =   MailPriority.High;

                myMail.BodyFormat   =   MailFormat.Text;

                myMail.Body   =   "测试！！！ ";

                myMail.Fields.Add( "http://schemas.microsoft.com/cdo/configuration/smtpauthenticate ",   "1 ");

                myMail.Fields.Add( "http://schemas.microsoft.com/cdo/configuration/sendusername ",   "fmtvlive ");

                myMail.Fields.Add( "http://schemas.microsoft.com/cdo/configuration/sendpassword ",   "fmtv2007 ");

                SmtpMail.SmtpServer   =   "smtp.126.com ";

                try
                {
                        SmtpMail.Send(myMail);
                }
                catch
                {
                        return   0;
                }
                return   1;
               
        }

------解决方案--------------------
SmtpMail.SmtpServer = "smtp.126.com ";
改成：
SmtpMail.SmtpServer= "IP地址 ";

不敢确定，试试吧
------解决方案--------------------
public bool SendMail(string Accept_Mail_Add,string Send_Mail_Add, string mail_title, string mail_doby)
{
MailMessage myMail = new MailMessage(Send_Mail_Add ,Accept_Mail_Add );
myMail.Subject = mail_title;
myMail.Body = mail_doby;
myMail.IsBodyHtml = true;

//设置SMTP
SmtpClient client = new SmtpClient();
client.Host = "smtp.126.com ";
client.Port = 25;

client.Credentials = new System.Net.NetworkCredential( "郵件地址 ", "密碼 ");
client.Send(myMail);

return true;
}
------解决方案--------------------
MailMessage mail = new MailMessage();
SmtpClient smtp = new SmtpClient();
MailAddress address1 = new MailAddress( "你的邮箱地址 ");
mail.To.Add( "别人的邮箱地 ");
mail.From = address1